232 



MALDANIyE. 



Arenicola Boeckii, Ratfike i7i Nov. Act. Acad. Nat. Cur. xx. 181. tab. 8. 



f. 19-22. 

 Lumbricus marinus, another species, Dalyell, Potv. Great, ii. 137- 



pi. 19. f. 4-6. 



Hab. The littoral region, in sand. 



Arenicola ecaudata (No. XLII.) is from 6 in. to 8 in. long, very 

 contractile, minutely granular, of a yellowish-brown, tinted in many 



No. XLII. — Arenicola ecaudata. 



places with green and yellow, or sometimes very black, glossed 

 with green. The primary rings seem to be composed of only four 

 intermediate ones. The first fourteen or fifteen pairs of setigerous 

 feet are destitute of branchise, but to every foot behind these there 

 is appended a dark red arborescent branchial tuft : in one specimen 

 there were twenty-two pairs, in another twenty-five ; the first few 

 pairs are smaller than those about the middle, whence they again 

 decrease towards the tail. In other respects the structure is similar 

 to that of Arenicola piscatorum. 



Obs. Grube has suggested that the A. ecauduta may be identical 

 with the preceding, and in support of this conjecture it may be re- 

 marked, that in both the first pair of branchiae are attached to the 

 same segment. In the few specimens I have seen, however, there 

 was no appearance of an apodous portion, for the last segment, which 

 was abranchial, had its pair of setigerous feet. This is confirmed by 

 the description and figure of Sir J. G. Dalyell. The fewest number 

 of pairs of branchiee I have seen is 22 and 25 ; Dalyell's specimen 

 had about 38 ; and Rathke introduces 40 into his specific character. 

 It is evident, however, that the number depends on age and en- 

 tirety ; for as there is no development of a posterior portion, there is 

 nothing, except maturity, to regulate the number of organs which 

 are developed in succession. 



Fam. XIV. MALDANI^. 



MALUANiiB, Savign. Syst. Annel. 92. 

 Maldania, Grube, Fam. Annel. TG. 



Char. Body vermiform, cylindrical ; the segments rather long, 

 more or less ringed, variable in size ; the anal with a funnel-shaped 



