176 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



cc, 2. Body muscles in solitary form complete uninterrupted loops; in aggre 



gated form decidedly asymmetrical Apsteinia. 



k, 1. Body muscles 7 in solitary form, 5 in aggregated form, contin- 

 uous in both forms across mid-dorsal and mid-ventral lines; 

 oral retractor muscle not continued far backward as 2 hori- 

 zontal bands on each side maghalanica. 



k, 2. Oral retractor muscles in solitary form continued far backward 



as two horizontal bands on each side, the dorsal one much the 



longer; body muscles in aggregated form interrupted ventrally . 



kk, 1. In solitary form lips and postero-ventral region near 



gut bearing many fine branching lines of pigment; 



aggregated zooid punctate with pigment spots 



along mid-ventral line (type) punctata. 



kk, 2. No pigmented lines or spots on lips or mid-ventral 

 area in either form asymmetrica . 



LITERATURE CITED. 



Apstein, 1894, a. Die Salpen der Berliner zoologischen Sammlung. Arch. Naturg., 

 vol. 60, pt. 1, p. 1. 



1894, b. Die Thaliacea der Plankton-Expedition. B. Vertheilung der Salpen. 



Ergeb. der Plankton-Exped. der Humboldt-Stiftung. By V. A. C. Hensen. Vol. 2. 

 Kiel and Leipzig. 



1901. Nordisches Plankton. Lief. 1. 



- 1904. Salpes d'Amboine. Rev. Suisse de Zool. Vol. 12, f. 3. 



1906, a. Die Salpen der deutschen Sudpolar-Expedition. Deutsche Stidpol.- 



Expedit. 1901-1903, vol. 9, Zool. 1. Berlin. 

 1906, b. Salpen der deutschen Tiefsee-Expedition. Wiss. Ergebhisse der 



Deutsch. Tiefs.-Expedit. 1898-99, vol. 12. Jena. 

 Banks, 1814. (In) Home, Lectures on Comparative Anatomy. Vol. 2, pis. 71-74. 



London. 

 Banks and Solander, 1773. Hawkesworth's Voyages, vol. 2, pp. 2-3. 

 de Blainville, 1827. Salpa. Dictionnaire des sciences naturelles. Vol. 47. Stras- 

 bourg and Paris. 

 Blumenbach, 1810. AbbildungennaturhistorischerGegenstande. No. 30. Gottingen. 

 Bory de St. Vincent, 1804. Voyage aux quatre iles d'Afrique. Vol. 1. Paris and 



Liege. 

 Bosc, 1802. Histoire naturelle des Vers. Vol. 2. Paris. 

 Brooks, 1886. The Anatomy and Development of the Salpa-Chain. Studies from 



the Biol. Lab. of the Johns Hopkins Univ. III. 

 1893. The genus Salpa. With a supplementary paper by Maynard M. Metcalf. 



Mem. Johns Hopkins Univ. II. 

 1908. The Pelagic Tunicata of the Gulf Stream. II. Salpa floridana. Publ. 



Carnegie Institution, 102. Washington. 

 Browne, Patrick, 1756. The Civil and Natural History of Jamaica. London. 

 Bruguiere, 1789. Histoire nat. des Vers, etc., Encyclopedic M6thodique. Vol. 1. 



Paris. 

 ( 'iiamisso, 1819. De animalibus quibusdam e classe Vermium Linnaeana. 1815-1818. 



Fasc. I. De Salpa. Berolini. 

 Costa, date uncertain. Fauna del Regno di Napoli, Animali molli. Ordine II. 



Acefali senza conchiglia. 

 Cuvier, 1804. Memoire sur les Thalides (Thalia, Browne) et sur les Biphores (Salpa 



Forskal). Ann. Mus. Hist. Nat. Vol. 4. 

 1817. Le Regne Animal distribue" d'apr6s son Organisation. Vol. 2. Paris. 



