GEPHYREA, CH2ET0GNATHI. 
Verm. 9 
37. Horst, R. Die Gephyrea. ii e Halffce : Priapulida and Sipunculida 
[from ‘Willem Barents’ Expedition]. Niederl. Arch. Zool. Suppl. 
i. 3, pp. 13-40. 
38. Rietscii, M. Etudes sur le Sternaspis scutata. Ann. Sci. Nat. (6) 
xiii. Art. No. 5, 84 pp., pis. xviii.-xxiii. 
39. Sluiter, C. Ph. Notiz iiber die Segmental-organe und Geschlechts- 
driisen einiger tropischen Sipunculiden. Tijdschr. Nederl. Dierk. 
Yer. vi. pp. 1-20, pi. i. 
40. Vejdovsky, F. Bemerkungen zur neueren und alteren Literatur 
iiber Sternaspis scutata. SB. bohm. Ges. 1882, pp. 438-450, 1 pi. 
For the earliest stages in the development of Phoronis, see Foettinger 
(36), where especial attention is directed to the early appearance of the 
mesoblast. 
Caldwell (35) has published the abstract of what promises to be a 
very important paper on Phoronis, including such generalizations as 
that the body-cavity is an enterocoele, and that other Trochosphores are 
probably also so, and that the Platyhelminths are degenerate entero- 
coeles. After an account of some adult characters, such as the division 
of the body-cavity into three chambers, the arrangement of the nephri- 
dial tube which opens into the posterior chamber, and the presence of a 
closed system of vessels containing red blood-corpuscles, the author gives a 
summary of the developmental history, describing the unequal segmenta- 
tion, the development of au invaginate gastrula, and the formation of 
the blood-vessels as splits in the splanchnopleure. The fully formed free- 
swimming larva is described, and the relations of Phoronis to the Dra- 
cliiopoda and Polyzoa briefly discussed. 
In his account of Priapulus bicaudatus, Horst (37) discusses some of 
the results of Koren & Danielssen, and describes the connection, through- 
out the whole of its length, of the nervous system with the ectoderm. 
The male organs, hitherto undescribed, have the same form and position 
as the female, but are racemose and not lamellar in structure. 
Rietsch (38) is convinced of the Annulate character of Sternaspis. 
Horst (37) describes as new Stephanostoma barentsi. 
Sluiter (39) describes as new: — 
Aspidosiphon fuscus. 
Phascolosoma nitritorquatus , falcidentatus, prioki. 
On Bonellein and its derivates, see C. F. W. Krukenberg, Vergl. 
physiol. Stud. Adria (Heidelberg : 1882) ser. ii. Abth. 2, pp. 70-80. 
CHiETOGNATHI. 
Sagitta faleidens , sp. n., Atlantic City, N. J., Leidy, P. Ac. Philad. 
1882, p. 102; Ann. N. H. (5) x. pp. 79 & 80. 
Grassi, G. B. Intorno ai Chetognathi. Rend. 1st. Lomb. xiv. 
pp. 199-213. 
