MOLLUSCA. 661 
' Onchidiid^. 
Onchidtum. The typical species, O. typha (Buch.), has been re- 
examined by F. Stoliczka ; he proves by anatomical investigation 
that it generically agrees throughout with O, peronii (Cuvier), 
and therefore that the genera Peronia (Blainv.) and Onchidella 
(Grray) are to be cancelled. The sexes are united in the same 
individual; but the generative glands are distinct from each 
other, not coalesced ; the vas deferens opens as does the oviduct 
in the hinder end of the animal; but a lateral furrow leads the 
sperma [somewhat as in Aplysid] to the penis, which is situated 
near the right tentacle. The tentacles are really retractile. The 
animal lives on muddy ground, near and also within brackish 
water, like the genus Scarabits ; one species, O. tenerum (Stol.), 
burrows in mud, sometimes several inches deep. Stoliczka, 
Journ. As. Soc. Bengal, xxxviii. pp. 86-111, pis. 14, 15. 
Onchidium pallidum, tigrinum, and tenerum, spp. iin., Lower Bengal. 
Stoliczka, 1. c, pp. 103, 105, 107, pi. 16. figs. 1-3. 
Oncidium celtieum, Jeffreys, Brit; Corichol. v. p. 96, pi. 3. fig. 6. [^Oncidium 
is a grammatical correction of Onchidiian.'] 
Onchidium carpenteri (Binn.), Cape St. Lucas, California. Binney & 
Bland, Land- and Freshwater Shells of N. Am. i. p. 307. 
VAGINULIDiE. 
Veronicella Jloridana (Binn.). Binney and Bland, 1. c. p. 3G3. 
Agnatha. 
Phytida (Alb.). Helix incequalis (Pfr.) has no jaw ; teeth of the radula 
as in Glandina. Semper, Zeitschr. wiss. Zool. xix. p. 625, with a woodcut ; 
Nachrichtshl. mal. Gesellsch. i. p. 170, pi. 1. fig. 2, and Ann. & Mag. Nat. 
Hist. V. p. 42. This species is viviparous. Semper, Nachrichtshl. mal. 
Gesellsch. i. p. 204. 
[^Rhytida?^ Zmites sti'angei (Pfr.), var. maxima, Mousson, Journ. Conch, 
xvii. p. 66. 
Helix {Phytida) boydi, sp. n., Angas, Proc. Zool. Soc. 1869, p. 626, pi. 48. 
fig. 8, Recherche Island, Solomon group. 
Glandina algira. Semper corrects some anatomical observations made by 
Raymond. Mal. Nachrichtshl. i. p. 80. 
Glandina truncata (Gmel.), vanuxemensis parallela (Binney), decus- 
sata (Desh.), turris (Pfr.), hullata (Gould), and texasiana (Pfr.), from the 
Southern States of North America, and alhersi (Pfr.) from California, de- 
scribed and figured in woodcuts by Binney and Bland, Laud- and Freshwater 
Shells of N. Am. i. pp. 13-20. 
Glandina guttata, sp. n., Crosse and Fischer, Journ. Conch, xvii. p. 260, 
Puebla, Mexico. — Glandina nympha, hellxda, and difficilis, spp. nn., Crosse 
and Fischer, 1. c. pp. 425, 426, Mexico. 
Streptostyla. Crosse & Fischer, 1. c. p. 28, state that the buccal lobes and 
radula are as in Glandina, but without a median row of teeth. They describe 
